LNK4114D-TL

LinkSwitch™-4 family energy-efficient, accurate primary-side regulated CV/CC switcher for adapters and chargers of ICs dramatically simplifies low power CV/CC charger design by eliminating an optocoupler and secondary control circuitry. The LinkSwitch-4 family adaptive BJT drive technology uses combined base and emitter switching to boost switching performance and deliver higher efficiency, wider reverse bias safe operating area (RBSOA) margin and the flexibility to accommodate a wide range of low cost BJT. The device incorporates a multimode PWM/PFM controller with quasi resonant switch to maximize the efficiency, meets low no-load power and at same time maintain fast transient response greater than 4.3V with a load change from 0% to 100%. Very accurate IC parameter tolerances using proprietary trimming technology. Applications includes chargers for cell/cordless phones, PDAs, MP3/portable audio devices, adapters, networking, etc.

• Easy start for starting into capacitive loads, 15W (adapter/open frame) at 85 - 265VAC output power
• EcoSmart™ energy efficient, no-load consumption of 30mW at 230VAC input
• Eliminates optocoupler, all secondary CV/CC control and all control loop compensation circuitry
• Compensates for input line voltage variations, compensates for cable voltage drop
• Compensates for external component temperature variations
• Minimum peak current is fixed to improve transient load response
• Very accurate IC parameter tolerances using proprietary trimming technology
• Extends RBSOA of BJT, dramatically reduces sensitivity to BJT gain
• Single fault output overvoltage and short-circuit, overtemperature protection, active clamp
• Meets DoE 6 and CoC V5 2016 via an optimized quasi-resonant switching PWM/PFM control